<AAA > 
    <BBB bbb = "11" >B1 </BBB> 
    <BBB bbb = "22" >B2 </BBB> 
    <BBB bbb = "33" >B3 </BBB> 
    <BBB bbb = "11" >B4 </BBB> 
    <BBB bbb = "11" >B5 </BBB> 
</AAA> 